New non-contacting, multi-turn, absolute rotary position sensors

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New non-contacting, multi-turn, absolute rotary position sensorsVariohm EuroSensor is now supplying the Novotechnik RSM2800 series non-contacting and multi-turn absolute rotary position sensors that are claimed to represent a breakthrough in sensing technology. These sensors provide an absolute position output for up to 16 turns (5760 electrical degrees) - and are true non-volatile devices that retain position in an unpowered state.

Available exclusively in the UK and Ireland from Variohm EuroSensor, the RSM2800 series has clear benefits over single-turn Hall-effect sensors and offers a competitively priced improvement on contacting wirewound potentiometers and incremental optical encoders that use internal gears for multi-turn angle sensing. Offering much improved reliability and a substantially longer working life than contact-based devices, the RSM also has a significantly lower entry cost than absolute optical encoders.

As well as improving the performance and life potential over panel-mount wirewound rotary motion transducers, the RSM2800 is also aimed at applications throughout industry, agriculture, construction and automotive - from steering angle detection in cars and trucks or mobile machinery, to valve and flap positioning in industrial processing, and as a low-cost absolute feedback system for servo controls. It will also be particularly useful in applications where its ability to provide multi-turn absolute position measurement after a power failure is desirable or where a power-up homing routine is not feasible.

Magnetoresistive technology

The magnetoresistive technology used in the RSM2800 combines angle and turn-detection elements and is similar in principle to position detection method used in hard disk drives. The non-contact device has a nominal housing diameter of just 30mm and is inherently durable with high resilience to shock and vibration and an operating temperature range of -40 to +85degC.

In addition to the selectable number of turns, from 2 to 16, the new RSM 2800 angle sensor is available with a flexible choice of configuration options including a 5 or 24V DC power supply, ratiometric, voltage or current outputs, clockwise or counter-clockwise output curve, dual redundant outputs, and shielded cable or M12 connectors.

Packaging options include a wide choice of flatted or marked 6mm diameter stainless steel output shafts, with sealed housings to IP54, IP65 or IP67. Push-on couplings can also be supplied. Contact Variohn-EuroSensor for more information about the Novotechnik RSM2800 series non-contacting, multi-turn, absolute rotary position sensors.

26 September 2011

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